
Programming Chapter 5
SCXI-1120 User Manual 5-14 © National Instruments Corporation
7. Follow the procedure given in the 4. Acquisition Enable, Triggering, and Servicing section
earlier in this chapter.
Example 3You want to scan five channels on an SCXI-1120 in Slot 4 of Chassis 1, then seven channels of
an SCXI-1120 in Slot 11 of Chassis 2, three channels of an SCXI-1120 in Slot 3 in Chassis 3,
and one channel of an SCXI-1120 in Slot 8 of Chassis 3.
Assuming that the modules are correctly cabled and programmed, the Slot 0 scan lists should be
as follows:
Chassis 1 Chassis 2 Chassis 3
Entry Slot
Number Count Entry Slot
Number Count Entry Slot
Number Count
1 4 51135 11312
213112117 2 3 3
3134 3 8 1
Other solutions are possible.
In the section earlier in this chapter, 3. Programming the Slot 0 Hardscan Circuitry, step 3, Write
the Slot 0 scan list to the FIFO, consists of the following steps:
1. Select Slot 14 in Chassis 1.
2. Write XXXXX001 10000100 over MOSI.
3. Toggle SLOT0SEL*.
4. Write XXXXX110 00001010 over MOSI.
5. Select Slot 14 in Chassis 2.
6. Write XXXXX110 00000100 over MOSI.
7. Toggle SLOT0SEL*.
8. Write XXXXX101 00000110 over MOSI.
9. Toggle SLOT0SEL*.
10. Write XXXXX110 00000011 over MOSI.
11. Select Slot 14 in Chassis 3.
12. Write XXXXX110 00001011 over MOSI.